package servlet.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

/**
 * User: key
 * ClassName:Filter01_Charset
 * Date: 2023/5/5
 * Time: 18:52
 * description:
 */
@WebFilter("/*")
public class Filter01_Charset implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse resp = (HttpServletResponse) servletResponse;
        String uri = req.getRequestURI();
        if(check(uri)){
            req.setCharacterEncoding("utf-8");
            resp.setContentType("text/html;charset=utf-8");
        }
        filterChain.doFilter(req,resp);
    }

    public boolean check(String path) {
        List<String> list = Arrays.asList(".html",".css",".js","/",".png");
        for (String s : list) {
            if(path.endsWith(s)){
                return false;
            }
        }
        return true;
    }

    @Override
    public void destroy() {

    }
}
